Issued Patents All Time
Showing 25 most recent of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12255583 | Temperature compensating adjustable ultraviolet lamp driver circuit and photoionization detector employing the driver circuit | Charles R. Willcox, Christopher Fields | 2025-03-18 |
| 12146854 | Galvanic current protection for photoionization detector | Charles R. Willcox, Christopher Fields | 2024-11-19 |
| 11476808 | Multi-component digital predistortion | Patrick Pratt | 2022-10-18 |
| 11271598 | Digital predistortion with out-of-band and peak expansion regularization | Patrick Pratt | 2022-03-08 |
| 10892786 | Digital predistortion with out-of-band and peak expansion regularization | Patrick Pratt | 2021-01-12 |
| 10727880 | Crest factor reduction in cable communication systems | Patrick Pratt | 2020-07-28 |
| 10650864 | Hard disk drive with cover and cover support | Gordon A. Harwood, Hany Michael Gross, Stanislaw Dobosz | 2020-05-12 |
| 10320340 | Frequency-shaped digital predistortion | Patrick Pratt | 2019-06-11 |
| 9934211 | System and methods for generating derivative websites | — | 2018-04-03 |
| 6741420 | Hydrodynamic spindle motor with an internally disposed heating element | John W. Elsing | 2004-05-25 |
| 6702408 | Single plate hydrodynamic bearing cartridge | Lakshman Nagarathnam, Hans Leuthold, Norbert Steven Parsoneault, Wesley R. Clark, Gunther Heine | 2004-03-09 |
| 6530143 | Apparatus for setting gaps in hydrodynamic bearing | Roger A. Addy, Wesley R. Clark | 2003-03-11 |
| 6525440 | Thermal compensation spindle for ceramic ball bearings | John W. Elsing, Martin F. Byl, Jeffery A. LeBlanc, Robert M. Pelstring | 2003-02-25 |
| 6293705 | Annular gimbal assembly suitable for disc drive spindle bearings and method of making same | John W. Elsing | 2001-09-25 |
| 6239943 | Squeeze film damping for a hard disc drive | Hans Leuthold, Lakshman Nagarathnam, Steve Gonzalez, Dean Tarrant, Gunter Heine +1 more | 2001-05-29 |
| 6119348 | Air gaging for setting gaps in hydrodynamic bearings | Roger A. Addy, Wesley R. Clark | 2000-09-19 |
| 5993066 | Fluid retention principle for hydrodynamic bearings | Hans Leuthold, Coda H. Pan, Lakshman Nagarathnam, Raquib Uddin Khan, Wesley R. Clark +1 more | 1999-11-30 |
| 5977674 | Single plate hydrodynamic bearing with self-balancing fluid level | Hans Leuthold, Gunter Heine, Lakshman Nagarathnam | 1999-11-02 |
| 5946958 | Device for manufacturing a groove bearing | Wesley R. Clark, Roger A. Addy, Samnathan Murthy | 1999-09-07 |
| 5930075 | Disc drive spindle motor having hydro bearing with optimized lubricant viscosity | Raquib Uddin Khan, Hans Leuthold, Gregory I. Rudd, Gunter Heine | 1999-07-27 |
| 5908247 | Sinusoidal grooving pattern for grooved journal bearing | Hans Leuthold, Lakshman Nagarathnam, Alan Lyndon Grantz, Steve Parsoneault | 1999-06-01 |
| 5793129 | Low distortion interference fits for spindle motor assembly | Norbert Steven Parsoneault, Hans Leuthold, Samnathan Murthy | 1998-08-11 |
| 5710678 | Disc drive with self-pressurizing fluid bearing and shaft-supporting-ball retaining element | Hans Leuthold, Lakshman Nagarathman, Steve Gonzalez, Dean Tarrant, Gunter Heine | 1998-01-20 |
| 5697708 | Hydrodynamic bearing with reduced temperature sensitivity | Hans Leuthold, Lakshman Nagarathnam, Raquib Uddin Khan, Greg Rudd | 1997-12-16 |
| 5685647 | Single plate hydrodynamic bearing with self-balancing fluid level and fluid circulation | Hans Leuthold, Wesley R. Clark, Raquib Uddin Khan, Guenther Heine | 1997-11-11 |